Eighth International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 46 (1985) C10-91-C10-94
DOI: 10.1051/jphyscol:19851020
STUDIES OF HYDROGEN TRAPPED BY NITROGEN OR OXYGEN IN NIOBIUM WITH ULTRASONIC ATTENUATION TECHNIQUE AND RESISTIVITY MEASUREMENTS
SAN-QIANG SHI et W.B. LIDept. of Physics, Beijing University of Iron and Steel Technology, Beijing, China
Abstract
Ultrasonic attenuation experiment showed that H occupies the third nearest o-site of N in niobium, the activation enthalpy of N-H pair was 0.20 eV, and the frequency factor was 3.0x1012sec-1. Results of resistivity measurements showed that three H atoms can be trapped per oxygen interstitial at low temperature in niobium, the trapping enthalpy being 0.13 eV.